Plumb-bob.



PATENTED DEC. 13, 1904.

C. J. UALEY.

PLUMB BOB.

APPLICATION FILED 11130.14, 190s.

' NO MODEL;

' 5 m vol MI swa /4m amwf i f No. 777,242. Patented December 13, 1904.

UNITED STATES PATENT O EIcE.

CHARLES J. CALEY, OF NEl/V BRITAIN, CONNE )TICUT, ASSIGNOR TO THE RUSSELL & ERWVIN MANUFACTURING COMPANY, OF NEW BRITAIN, CONNECTICUT, A CORPORATION OF CONNECTICUT.

PLUMB-BOB.

SPECIFICATION forming part of Letters Patent No. 777,242, dated D m r 13, 1904.

Application filed December 14, 1903. Serial No. 185,017. (No model-i T all wk/Om it y 00110677717 the upper end of the shank 4E. The top of this Be it known that 1, CHARLEs J. CALnY, a tip is perforated, as at 6, to providea passage 5 citizen-of the United States, residing at New for the plumb-line, the lower end of which is Britain, in the county of Hartford, State of passed through the opening and knotted on 5 Connecticut, have invented certain new and the inside of the tip before securing the tip in useful Improvements in Plumb-Bobs, of which place. It will be seen on inspection that this the following is a full, clear, and exact detip may be removed withontin any way affectscription. ing the security of the other parts. The tip My invention relates to improvements in also serves to draw the parts securely into po- 10 plumb-bobs, and particularly to the mechansition and act as a thumb-nut, the edge of the ical construction thereof. tip being preferably knurled in order to af- The object of my invention is to produce a ford a better grip.

. plumb-bob of suitable form which may be 7 is a load or weight, which is preferably cheaply and economically manufactured and shaped to conform to the interior of the casing I5 which will subserve with efiiciency the purto give to the plumb-bob the desired weight. poses of instruments of this character. This lead is preferably formed of lead and The invention consists in the employment is usually cast. A longitudinal passageway 5 of a casing inclosing a load or weight and through the load corresponds to the shank means for securing these parts together in 4: and may be of such a size as will give the 20 such a way that their assembling maybe simload the weight desired. Thus for a heavy ple. The parts are so constructed that a load plumb-bob thepassage through theload would of any desired weight may be interchangcably be small, while for a lighter plumb-bob the 7 employed at will. The particular construction load would be cored out to a greater extent, will be seen on an inspection of the accomso as to make it lighter and of the weight de- 2 5 panying single sheet of drawings, in whichsired. in this manner plumb-bobs may be Figure 1 is a view showing the parts of my manufactured of any weight desired by simimproved plumb-bob disassembled and in side ply making the load of the proper weight and elevation. Fig. 2 is aplan view of the plumbinserting it in the casing and securing it in bob. Fig. 3 is a longitudinal cross-section of position by the point and shank.

3 the same, showing part in elevation. Fig. 4 By this construction the manufacturer may is a bottom plan view. conveniently and economically furnish a com The casing is preferably formed of sheet plete plumb-bob with one or more extra loads metal and in two parts, the main body 1 and of different weights, so that the user can the cap 2, one of which is provided with a readily interchange the loads to obtain a bob 35 fillet and the other with a corresponding rehaving the weight desired or necessary for the cess, forming an overlapping joint, to the work which he may have in hand. more perfectly aline the parts. "What I claim is 5 3 is a conical. point formed, preferably, of 1. A plumb-bob comprising the combinahardened metal, as of steel. tion of a casing formed of two shell-like parts 4 4. is a shank attached to the point The having an overlapping joint, a load member screw-threadedportion of the shank a screws fitting into both of said parts, a point at the into a tapped hole in the top of the cap 2 and lower end with a shank extending through thus is adapted to draw the parts securely tosaid lead and having a screw-threaded portion 'gether, the head of the point having a shoulat the upper end, the upper part of said casing 45 der to abut against the lower end of the casbeing screwed onto said shank and a tip meming 1. her attached to said shank and arranged for 5 is a tip, which is screw-threaded on the inthe attachment of the plumb-line. terior and adapted to be screwed down onto 2. A plumb-bob comprising the combination of a casing formed of two shell-like parts, a load member fitting into both of said parts, a point at the lower end with a shank extending through said load and having a screwthreaded portion at the upper end, a tip member attached to said shank and arranged for the attachment of the plumb-line the other parts being held together independently of the tip.

3. In a plumb-bob the combination of a casing formed of two shell-like portions having overlapping edges, a load member inclosed by said casing, a conical point havinga shoulder for supporting said casing and a shank extending through said load, a tip member arranged for the attachment of the plumb-line the other parts being held togetherindependently of said tip.

L. A plumb-bob comprising a casing formed in two parts, a load inclosed thereby, a removable point at the lower end of said casing with a shank extending through said casing and a tip secured to the upper end of said shank having means for the securing of the plumb-line.

5. A plumb-bob comprising a casing formed of two shell-like parts, a point at the lower end, a load removably contained within said casing and constituting the main weight of the bob, a tip at the upper end and a shank for securing said parts together.

6. A plumb-bob comprisinga casing formed of the two parts 1 and 2, a load 7 removably fitting therein, a point 3 and a shank 4 for securing the parts together.

Signed at New Britain, Connecticut, this 10th day of December, 1903.

CHAS. J. CALEY. 

